Warner Bros. is celebrating its 90th anniversary this year, and the film studio is comemmorating the milestone by releasing several box sets, including the newly released 20-film collection featuring "Best Pictures."

The "Best Pictures" compliation is now available in stores and online (get it HERE at the WB shop). The collection features a variety of films from different eras, giving viewers a glimpse through time via some truly remarkable films.

1929-1942 (A New Era)

The Broadway Melody (1929)
Grand Hotel (1932)
Mutiny on the Bounty (1935)
The Life of Emile Zola (1937)
Gone With The Wind (1939)
Mrs. Miniver (1942)
Casablanca (1942)

Holding its own against stiff competition (many consider 1939 to be the greatest year of the classical Hollywood studios), "Gone With the Wind" won a staggering 10 Academy Awards, including Best Picture, Best Director, Best Screenplay, Best Actress (Vivien Leigh), and Best Supporting Actress (Hattie McDaniel, the first African-American to win an Oscar).

Starring relative unknown Leigh as Scarlett O'Hara and Clark Gable as Rhett Butler, the film faithfully adapted the book's Civil War era travails of a Southern belle and her roguish match.

In one of the most pivotal moments, the engrossing and spectacular movie recreates the burning of Atlanta (in which old sets were torched). Premiering first in Atlanta, "Gone With the Wind" delivered on the promise of the hype and smashed box-office records.

Watch a clip (below) from "Casablanca," one of the most beloved American films of all time. Many have called it the greatest Hollywood film ever made.

1946-1959 (The Golden Years)

The Best Years of Our Lives (1946)
An American in Paris (1951)
Around the World in 80 Days (1956)
Gigi (1958)
Ben-Hur (1959)

The biblical epic "Ben-Hur" won 11 Academy Awards. It's Oscar haul included Best Picture, Best Director for the legendary William Wyler, Best Actor for Charlton Heston, and Best Supporting Actor for Welsh actor Hugh Griffith as an Arab sheik.

The highlight of the film's 212 minutes was its legendary chariot race, staged largely by stunt expert Yakima Canutt. 

"An American in Paris" won seven Academy Awards and was highly successful at the box office. The film set a new standard for the subgenre known as the "songbook" musical. Watch a clip:

1975-2006 (The New Classics)

One Flew Over the Cuckoo's Nest (1975)
Chariots of Fire (1981)
Amadeus: Director's Cut (1984)
Driving Miss Daisy (1989)
Unforgiven (1992)
The Lord of the Rings: The Return of the King (2003)
Million Dollar Baby (2004)
The Departed (2006)

"The Lord of the Rings: The Return of the King" made history by becoming the first fantasy film to take home the Oscar for Best Picture. The passion, detail, dedication, skill, and hard work that went into the film led to such a great accomplishment.

Clint Eastwood's Oscar-winner "Unforgiven" examined the mythic violence of the western. The film became one of only a handful of westerns to win an Academy Award for Best Picture. Eastwood was also acknowledged for the first time for his behind-the-camera work, winning Best Director.